Admitted to Mt. Abaddon Hospital for a routine procedure, George Grieves discovers that his condition is much more serious and complicated than originally expected; and as his own fears begin to manifest around him, he learns that Mt. Abaddon is not a place where people come to get better... it is a place where people come to die.

Tom Cavanagh
as George Grieves

Kathleen York
as Jenny

Lawrence Hilton-Jacobs
as Mandingo

Kat Coiro
as Zoe

David Clayton Rogers
as Billy

Cas Anvar
as Dr. Sharazi

Shanna Collins
as Chloe

Kyle Gallner
as Ned

Bruce Nozick
as Ira

Dan Gerrity
as The Bald Man